| タイトル | Cold cathode gauge experiment (ALSEP) |
| 本文（外部サイト） | http://hdl.handle.net/2060/19740021148 |
| 著者（英） | Johnson, F. S.; Evans, D. E. |
| 著者所属（英） | Texas Univ. |
| 発行日 | 1974-03-01 |
| 言語 | eng |
| 内容記述 | Cold cathode ionization gages were left on the lunar surface as part of ALSEP (Apollo Lunar Surface Experiment Package) on Apollo missions 12, 14, and 15. An instrument prepared for Apollo 13 did not reach the surface because of the abort of that mission. The gages that reached the lunar surface measured the amounts of gas present in the vicinity of the ALSEP sites. The observed daytime gas concentrations were initially about two orders of magnitude greater than the nighttime observations; this was due to contamination of the landing area by the Apollo operations and equipment, and the daytime measurements showed a decrease with time characterized by a time constant of a few months. |
| NASA分類 | SPACE SCIENCES |
| レポートNO | 74N29261
NASA-CR-134348 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/193770 |
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